1 Chronicles 2:3 in the World English Bible
The sons of Judah: Er, Onan, and Shelah, which three were born to him of Shua’s daughter the Canaanitess. Er, Judah’s firstborn, was wicked in the LORD’s sight; and he killed him.
Context
2 Dan, Joseph, and Benjamin, Naphtali, Gad, and Asher.
3 The sons of Judah; Er, and Onan, and Shelah: which three were born unto him of the daughter of Shua the Canaanitess. And Er, the firstborn of Judah, was evil in the sight of the LORD; and he slew him.
4 And Tamar his daughter in law bare him Pharez and Zerah. All the sons of Judah were five.